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Biomedical subjects

H Köhler

Publications and source records attributed to H Köhler.

696 records · Page 39Linked to original sources
PubMedDate not supplied

[Rheumatologic and radiologic symptoms of secondary hyperparathyroidism: retrospective long-term study of 175 chronic hemodialysis patients].

Despite recent improvements of hemodialysis (HD) techniques, symptoms due to secondary hyperparathyroidism (HPT) contribute to longtime complications of HD patients. The aim of the present retrospective study was to determine the incidence and localization of radiological joint and bone lesions in 175 patients on chronic HD. In 108 patients the diagnosis of HPT was made by radiologic criteria. 56% had radiomorphologic lesions of the hands, 45% of the acromio-clavicular (AC) joint, 31% of the shoulder, and 27% of the pelvis. No sex difference was found for prevalence of HPT in these patients, nor was one found for any of the underlying renal diseases. There was a negative correlation between elevated serum parathyroid hormone and serum aluminum concentrations. In 111 patients the history of bone and joint pain was evaluated. 54% of these patients suffered from bone pain, arthralgia, and morning stiffness. Radiological lesions of AC-joint correlated with shoulder pain in 38%. Our data show that even in the predialytic phase of renal insufficiency x-rays of the shoulder are helpful in early diagnosis of HPT. Skeletal manifestations specific for one of the underlying renal diseases do not exist. Elevated PTH levels are a good indicator of HPT in these patients, whereas low levels of PTH do not exclude radiological manifestations. In contrast to beta 2-microglobulin amyloidosis, pain does not occur during rest and is not worsened during HD. Treatment with non-steroidal antiinflammatory drugs led to pain relief in the majority of patients. Pain history in patients on chronic HD provides important information concerning the differential diagnosis of HPT/beta 2-microglobulin amyloidosis.

Adult↗
PubMedDate not supplied

[Rheumatologic and radiologic symptoms of dialysis-associated beta 2-microglobulin amyloidosis: long-term retrospective study of 175 chronic hemodialysis patients].

beta 2-microglobulin amyloidosis is a major complication in chronic hemodialysis patients. Destructive arthropathy, spondylarthropathy, and carpal tunnel syndrome are clinical manifestations of beta 2M amyloid depositions within the joints, intervertebral discs, and tendon sheets. We have investigated the prevalence of beta 2M amyloidosis associated radiological joint lesions in a population of 175 patients on chronic hemodialysis. In 32 of 175 patients the diagnosis of amyloidosis arthropathy and spondylarthropathy was made by radiomorphological criteria. These 32 patients were asked about rheumatic symptoms (localisation and character of pain, synovitis, carpal tunnel syndrome, influence of dialysis membrane on pain) and examined clinically. Bilateral pain of the shoulders or wrists was complained by most of the patients. 24 of the 32 patients had signs of secondary hyperparathyroidism besides beta 2M-amyloidosis. 29 patients had a carpal tunnel syndrome, 23 of whom had to be operated. beta 2M-amyloid was histochemically demonstrated in all of these 23 cases. Renal transplantation led to immediate pain relief in 3 out of 3 patients, a change of the dialysis membrane (high-flux membrane) improved chronic pain in the majority of patients.

Adult↗
PubMedDate not supplied

Regulation of immune response by anti-receptor antibody.

A new function of antibodies in the regulation of immune responses is proposed. Antibodies have specific variable sequence determinants which are detected by anti-idiotypic antisera. Anti-idiotypic antibodies can suppress the production of the complementary idiotypic antibody and are, therefore, specific anti-receptor antibodies. Experiments in inbred mice have shown that mutual and reciprocal functional interactions of idiotype and anti-idiotype can occur. These findings give evidence for regulatory mechanisms in the expressions of immune clones by complementary idiotypes.

Animals↗
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[Hemorheologic effect on the long-term course of peripheral arteriosclerotic circulatory disorders in the elderly].

The authors report the progress of arteriosclerotic circulatory disturbances of the legs (stage II according to Fontaine) in 32 male patients aged between 47 and 60 years. According to the risk factor profile (smoking, hyperlipoproteinaemia, or hypertension), 2 patients each were linked to form matched pairs. It showed that in the group of patients with raised haematocrit reading the reactive circulation through the legs decreased significantly with constant intermittent claudication within 4 years. The group with lower haematocrit reading, however, showed no significant decrease of the peak flow, the walking ability increased considerably.

Arteriosclerosis↗
PubMedDate not supplied

[Long-term oil therapy in elderly patients with peripheral arterial occlusive disease].

3-years dietetic application of polyenic fatty acids in 41 patients with peripheral arterial occlusion disease evoked significantly alterations of total and LDL-cholesterol level and of the serum fatty acid spectrum. These alterations must be valued as "antiatherogenic" although the HDL-cholesterol was not influenced. Linolenic acid enriched linseed oil seems to be more efficient than linolenic acid enriched sun flowers oil.

Arterial Occlusive Diseases↗
PubMedDate not supplied

[Clinical significance of arteriosclerosis indices of lipid metabolism and age dependence].

Age, arteriosclerosis indices, HDL-cholesterol, hyperlipoproteinemia, lipoproteins In 193 normal persons, 86 patients with arteriosclerosis obliterans of the lower extremities, 170 HLP patients, 87 adiposity patients and 22 chronic alcoholics were determined the arteriosclerosis indices (formula; see text) The arteriosclerosis indices increase in healthy males from the age of 30 and healthy females from the age of 45. In case of peripheral arterial occlusion HLP and adiposity the arteriosclerosis indices are elevated and give diagnostic and prognostic hints as to increased arteriosclerotic risk for these diseases.

Adolescent↗
PubMedDate not supplied

Antibody-mediated gene delivery for B-cell lymphoma in vitro.

The targeted introduction of therapeutic genes into malignant cells based on receptor mediated endocytosis of ligand-DNA conjugates recently was established as a transfection system and provides a promising strategy for cancer therapy. Antiidiotype antibodies could be of particular interest for this approach because their immunoglobulin receptor idiotypes represent highly specific tumor markers. Their safe and specific applicability in vivo, alone or as immunotoxins, has been proven in clinical trials for passive immunotherapy and vaccination strategies. For these reasons we have explored the utility of antiidiotype antibodies for gene delivery systems using the reporter genes beta-galactosidase and luciferase. Two monoclonal antibodies, SIC5 and 5D10, specific for B-lymphoma cell lines, which represent models for murine plasmacytoma (38C13) and human non-Hodgkin's lymphoma (SU-DHL-4) have been covalently linked to polylysine via the heterobifunctional cross-linker SPDP. Highly efficient uptake and internalization of the immunoconjugates have been shown by fluorescence microscopy and fluorescence-activated cell sorting (FACS) analysis. Successful transfections have been shown at the RNA and the reporter gene level (beta-galactosidase, luciferase) using different promoter/enhancer systems. Beta-galactosidase activity was detected by flow cytometry (FACS-gal) analysis for both cell lines, and SU-DHL-4 cells showed significant luciferase activity.

Animals↗